50 lines
1.5 KiB
V
50 lines
1.5 KiB
V
// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
|
|
// Use of this source code is governed by an MIT license
|
|
// that can be found in the LICENSE file.
|
|
import net.http
|
|
import json
|
|
import sync
|
|
|
|
struct Story {
|
|
title string
|
|
url string
|
|
}
|
|
|
|
fn worker_fetch(p &sync.PoolProcessor, cursor int, worker_id int) voidptr {
|
|
id := p.get_int_item(cursor)
|
|
resp := http.get('https://hacker-news.firebaseio.com/v0/item/${id}.json') or {
|
|
println('failed to fetch data from /v0/item/${id}.json')
|
|
return sync.no_result
|
|
}
|
|
story := json.decode(Story,resp.text) or {
|
|
println('failed to decode a story')
|
|
return sync.no_result
|
|
}
|
|
println('# $cursor) $story.title | $story.url')
|
|
return sync.no_result
|
|
}
|
|
|
|
// Fetches top HN stories in parallel, depending on how many cores you have
|
|
fn main() {
|
|
resp := http.get('https://hacker-news.firebaseio.com/v0/topstories.json') or {
|
|
println('failed to fetch data from /v0/topstories.json')
|
|
return
|
|
}
|
|
mut ids := json.decode([]int,resp.text) or {
|
|
println('failed to decode topstories.json')
|
|
return
|
|
}
|
|
if ids.len > 10 {
|
|
ids = ids[0..10]
|
|
}
|
|
mut fetcher_pool := sync.new_pool_processor({
|
|
callback: worker_fetch
|
|
})
|
|
// NB: if you do not call set_max_jobs, the pool will try to use an optimal
|
|
// number of threads, one per each core in your system, which in most
|
|
// cases is what you want anyway... You can override the automatic choice
|
|
// by setting the VJOBS environment variable too.
|
|
// fetcher_pool.set_max_jobs( 4 )
|
|
fetcher_pool.work_on_items_i(ids)
|
|
}
|